fix runtime prepare pass (#4502)

Co-authored-by: lufang.chen <lufang.chen@nio.com>

colossalai/auto_parallel/passes/runtime_preparation_pass.py

@@ -144,7 +144,7 @@ def size_value_converting_pass(gm: torch.fx.GraphModule, device_mesh: DeviceMesh
 
     # DeviceMesh information instructs the scaling of the size value
     device_mesh_info = {}
-    for dim, dim_size in enumerate(device_mesh.mesh_shape):
+    for dim, dim_size in enumerate(device_mesh.shape):
         device_mesh_info[dim] = dim_size
 
     def _extract_target_dim(node):